We recently came across two products that looked interesting in that they both have been manufacturered to incorporate Microban, an antibacterial material that can be added to products to make them mould free.
The products in question were grout and silicone sealant - both products that can be adversely affected by mould growth (although faulty application/installation can also be a major cause of these types of products failing).
The grout is made by BAL - details can be found on their website at www.building-adhesives.com (look under rthe catalogue section of the BAL pages)
The silicone is Forever White by Everbuild - details on www.everbuild.co.uk